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    NRC Issues Event Notification for Peach Bottom Nuclear Plant, Pa.

    May 18, 2022 - Targeted News Service


      WASHINGTON, May 18 -- The Nuclear Regulatory Commission issued the following event notification (No. 55899) involving Peach Bottom Nuclear Plant, Pennsylvania:


      The following information was provided by the licensee via fax:

      "Unit 2 experienced multiple electrical transients resulting in a Group I Primary Containment Isolation Signal (PCIS) isolation and subsequent unit reactor scram. Low reactor water level during the automatic scram caused PCIS Group II and III isolation signals. Following the PCIS Group I isolation, all main steam lines isolated. All control rods inserted and all systems operated as designed."

      The following additional information was obtained from the licensee via phone in accordance with Headquarters Operations Officers Report Guidance:

      Peach Bottom Unit 2 automatically scrammed from 100 percent power due to an electrical transient and subsequent PCIS Group I isolation (Main Steam Isolation Valve closure). Unit 2 lost main feedwater due to the PCIS Group I isolation, however, all other systems responded as expected following the scram. High Pressure Coolant Injection is maintaining pressure control while Condensate Pumps are maintaining inventory. The unit is currently stable and in Mode 3. Peach Bottom Unit 3's Adjustable Speed Drives were impacted by the electrical transients and the unit reduced power to 98 percent power.

      The NRC Resident Inspector was notified.

      Power Reactor

      Event Number: 55899

      Facility: Peach Bottom

      Region: 1

      State: PA

      Unit: [2] [] []

      RX Type: [2] GE-4,[3] GE-4

      NRC Notified By: Linell, Bill

      HQ OPS Officer: Brian P. Smith

      Notification Date: 05/16/2022

      Notification Time: 19:51 [ET]

      Event Date: 05/16/2022

      Event Time: 15:52 [EDT]

      Last Update Date: 05/16/2022

      Emergency Class: Non Emergency

      10 CFR Section:

      50.72(b)(2)(iv)(B) - RPS Actuation - Critical

      50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation

      Person (Organization):

      Lilliendahl, Jon (R1DO)

      Table omitted:


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